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  <script>
    //1.替换字符 replave('被替换的字符'，'替换为的字符') 它只会替换附一个字符
    var str = 'andyandy';
    console.log(str.replace('a', 'b'));
    //有一个字符串 'abcoefoxyozzopp' 要求把里面所有的 o 替换为 *
    var str1 = 'abcoefoxyozzopp'
    while (str1.indexOf('o') !== -1) {
      str1 = str1.replace('o', '*');
    }
    console.log(str1);

    //2.字符转换为数组 split('分隔符')  前面我们学过 join 把数组转换为字符串
    var str2 = 'red,pink,blue';
    console.log(str2.split(','));
    var str3 = 'red&pink&blue';
    console.log(str3.split('&'));
  </script>
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